To allow a child ticket to inherit values from the parent ticket, the option needs to be enabled and the field to be inherited need to be set up on the child tickets for the values to be transferred from the parent to the child ticket. follow the below steps to enable this:
- Log in to the admin console
- Go to Service Desk | Configuration | Process Templates
- Click on Action | New (or edit an existing process template)
- On the Define Process Template page, ensure to Check the option "Allow child ticket to inherit fields at creation time from parent ticket"
- Click the Save and continue button
- Add a Parent ticket
- Set values as desired
- Click Save when done
- Add Child tickets (select the same queue and template as the Parent ticket)
- Set a check on fields to inherit values from the parent ticket

- Click Save when done
- When done, Click on Save and continue to continue setting up the process
- Remember to enable the process template
- When done click on Finish
To test out the inheritance, simply submit a ticket, notice the Child tickets will inherit the fields selected to be inherited for each one.
Note: there are some guidelines as to what can and cannot be inherited, please follow guidelines on What can a Child ticket inherit from the Parent ticket (316779)